农药学学报2016，Vol.18Issue(5)：582-588,7.DOI:10.16801/j.issn.1008-7303.2016.0082
中国河南省小麦纹枯病菌对苯醚甲环唑及戊唑醇的敏感性
Sensitivity to difenoconazole and tebuconazole ofRhizoctonia cerealis in Henan province in China
摘要
Abstract
The sensitivities ofRhizoctonia cerealisto difenoconazole and tebuconazole were evaluated by measuring the mycelial growth on the fungicide-amended media using 95 isolates collected from 15 cities within Henan province, China. The results indicated that 50% effective concentration (EC50) values of all isolates to difenoconazole and tebuconazole ranged from 0.014 to 1.609 μg/mL and 0.002 to 0.064 μg/mL, respectively. The results of the frequency analysis revealed that subpopulation, which is less sensitive to difenoconazole had been discovered in the tested isolates. However, most of isolates were sensitive to tebuconazole. The mean EC50values of (0.165 ± 0.101) μg/mL and (0.019 ± 0.008)μg/mL for most isolates showed a unimodal curve distribution, which was treated as the sensitivity baseline ofR. cerealisto difenoconazole and tebuconazole respectively. The mean EC50value of difenoconazole was 26 times higher than that of tebuconazole, which meant thatR. cerealiswas more sensitive to tebuconazole. The isolates collected from different regions demonstrated different sensitivities. Especially, the correlation efficient existed between difenoconazole and tebuconazole was very low. The results provided a theoretical basis for the efficient application of fungicides in the control of wheat sharp eyespot in the field in Henan province.关键词
小麦纹枯病菌/苯醚甲环唑/戊唑醇/敏感性Key words
Rhizoctonia cerealis/difenoconazole/tebuconazole/sensitivity分类
农业科技引用本文复制引用
徐建强,刁兴旺,李恒,杨霞,王蓓蓓,刘庆涛..中国河南省小麦纹枯病菌对苯醚甲环唑及戊唑醇的敏感性[J].农药学学报,2016,18(5):582-588,7.基金项目
公益性行业(农业)科研专项(201303023)；国家自然科学基金(31401774)；河南科技大学大学生研究训练计划(2015148) （农业）
